ISO/IEC/IEEE 8802-1AX:2016
(Main)Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 1AX: Link aggregation
Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 1AX: Link aggregation
Link Aggregation provides protocols, procedures, and managed objects that allow the following: - One or more parallel instances of full-duplex point-to-point links to be aggregated together to form a Link Aggregation Group (LAG), such that a MAC Client can treat the LAG as if it were a single link. - A resilient interconnect using multiple full-duplex point-to-point links among one to three nodes in a network and one to three nodes in another, separately administered, network, along with a means to ensure that frames belonging to any given service will use the same physical path in both directions between the two networks. ISO/IEC/IEEE 8802-1AX:2015 defines the MAC-independent Link Aggregation capability and general information relevant to specific MAC types that support Link Aggregation. The capabilities defined are compatible with previous versions of this standard.
Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseaux locaux et métropolitains — Exigences spécifiques — Partie 1AX: Agrégation de lien
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INTERNATIONAL ISO/IEC/
STANDARD IEEE
8802-1AX
First edition
2016-01-15
Information technology —
Telecommunications and information
exchange between systems — Local and
metropolitan area networks — Specific
requirements
Part 1AX:
Link Aggregation
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseaux locaux et métropolitains —
Exigences spécifiques —
Partie 1AX: Agrégation de lien
Reference number
ISO/IEC/IEEE 8802-1AX:2016(E)
©
IEEE 2014
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ISO/IEC/IEEE 8802-1AX:2016(E)
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ISO/IEC/IEEE 8802-1AX:2016(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees established
by the respective organization to deal with particular fields of technical activity. ISO and IEC technical
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ISO/IEC/IEEE 8802-1AX was prepared by the LAN/MAN of the IEEE Computer Society (as
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© IEEE 2014 – All rights reserved iii
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IEEE Standard for
Local and metropolitan area networks—
Link Aggregation
IEEE Computer Society
Sponsored by the
LAN/MAN Standards Committee
IEEE
IEEE Std 802.1AX™-2014
3 Park Avenue
(Revision of
New York, NY 10016-5997
IEEE Std 802.1AX-2008)
USA
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IEEE Std 802.1AX™-2014
(Revision of
IEEE Std 802.1AX-2008)
IEEE Standard for
Local and metropolitan area networks—
Link Aggregation
Sponsor
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 10 December 2014
IEEE SA-Standards Board
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ISO/IEC/IEEE 8802 1AX:2016(E)
Abstract: MAC-independent Link Aggregation capability and general information relevant to
specific MAC types are defined in this standard. Link Aggregation allows parallel full-duplex point-
to-point links to be used as if they were a single link and also supports the use of multiple links as
a resilient load sharing interconnect between multiple nodes in two separately administered
networks.
Keywords: Aggregated Link, Aggregator, Distributed Resilient Network Interconnect, DRNI,
®
IEEE 802 , IEEE 802.1AX™, interconnect, Link Aggregation, Link Aggregation Group, local area
network, management, Network-Network Interface, NNI
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Copyright © 2014 by The Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 30 December 2014. Printed in the United States of America.
IEEE and 802 are registered trademarks in the U.S. Patent & Trademark Office, owned by The Institute of
Electrical and Electronics Engineers, Incorporated.
Print: ISBN 978-0-7381-9448-6 STD20052
PDF: ISBN 978-0-7381-9449-3 STDPD20052
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ISO/IEC/IEEE 8802 1AX:2016(E)
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ISO/IEC/IEEE 8802 1AX:2016(E)
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ISO/IEC/IEEE 8802 1AX:2016(E)
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ISO/IEC/IEEE 8802 1AX:2016(E)
Participants
The following individuals were officers and members of the Higher Layer LAN Protocols Working Group at
the beginning of the Working Group ballot. Individuals may have not voted, voted for approval, disapproval,
or abstained on this standard.
Glenn Parsons, Working Group Chair
John Messenger, Working Group Vice Chair
Stephen Haddock, Chair, Interworking Task Group
Michael Seaman, Chair, Security Task Group
Michael Johas Teener, Chair, Time Sensitive Networking Task Group
Pat Thaler, Chair, Data Center Bridging Task Group
Maximilian Riegel, Chair, OmniRAN Task Group
Eric Gray, Recording Secretary
Ting Ao Hitosh Hayakawa Karen Randall
Jeremy Hitt
Christian Boiger Dan Romascanu
Paul Bottorff Rahil Hussain Jessy V. Rouyer
David Chen Anthony Jeffree Panagiotis Saltsidis
Feng Chen Peter Jones Behcet Sarikaya
Weiying Cheng Hal Keen Daniel Sexton
Diego Crupnicoff Marcel Kiessling Johannes Specht
Rodney Cummings Yongbum Kim Kevin B. Stanton
Patrick Diamond Philippe Klein Wilfried Steiner
Aboubacar Kader Diarra Jouni Korhonen Vahid Tabatabaee
Janos Farkas Jeremy Touve
Jeff Lynch
Norman Finn Ben Mack-Crane Karl Weber
Geoffrey Garner Christophe Mangin Yuehua Wei
Anoop Ghanwani James McIntosh Brian Weis
Mark Gravel Eric Multanen Jordon Woods
Craig Gunther Donald Pannell Juan-Carlos Zuniga
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ISO/IEC/IEEE 8802 1AX:2016(E)
The following members of the individual balloting committee voted on this standard. Balloters may have
voted for approval, disapproval, or abstention.
James Innis
Thomas Alexander Michael Newman
Richard Alfvin Osamu Ishida Nick S.A. Nikjoo
Butch Anton Akio Iso Paul Nikolich
Jacob Ben Ary Atsushi Ito Satoshi Obara
Nancy Bravin Raj Jain Maximilian Riegel
William Byrd Anthony Jeffree Dan Romascanu
Juan Carreon Michael Johas Teener Jessy V. Rouyer
Keith Chow Peter Jones Panagiotis Saltsidis
Charles Cook Shinkyo Kaku Peter Saunderson
Piotr Karocki Michael Seaman
Patrick Diamond
Yezid Donoso Stuart Kerry Kapil Sood
Sourav Dutta Yongbum Kim Thomas Starai
Donald Eastlake, 3rd Bruce Kraemer Rene Struik
Richard Edgar Geoff Ladwig Walter Struppler
Mark Laubach William Taylor
Andrew Fieldsend
Yukihiro Fujimoto John Lemon Dmitri Varsanofiev
Devon Gayle Ru Lin Prabodh Varshney
Anoop Ghanwani Elvis Maculuba George Vlantis
Randall Groves Roger Marks Hung-Yu Wei
Andreas Wolf
Chris Guy Jeffery Masters
Stephen Haddock Brett Mcclellan Chun Yu
Werner Hoelzl Jonathon Mclendon Charles Wong
Rita Horner Richard Mellitz Michael Wright
Victor Hou John Messenger Oren Yuen
Noriyuki Ikeuchi Charles Moorwood Daidi Zhong
Jose Morales
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ISO/IEC/IEEE 8802 1AX:2016(E)
When the IEEE-SA Standards Board approved this standard on 10 December 2014, it had the following
membership:
John Kulick, Chair
Jon Walter Rosdahl, Vice Chair
Richard H. Hulett, Past Chair
Konstantinos Karachalios, Secretary
Peter Balma Michael Janezic Ron Peterson
Farooq Bari Jeffrey Katz Adrian Stephens
Joseph L. Koepfinger* Peter Sutherland
Ted Burse
David J. Law Yatin Trivedi
Clint Chaplain
Hung Ling Phil Winston
Stephen Dukes
Don Wright
Jean-Phillippe Faure Oleg Logvinov
Yu Yuan
T. W. Olsen
Gary Hoffman
Glenn Parsons
*Member Emeritus
Also included are the following nonvoting IEEE-SA Standards Board liaisons:
Richard DeBlasio, DOE Representative
Michael Janezic, NIST Representative
Michelle Turner
IEEE-SA Content Publishing
Kathryn Bennett
IEEE-SA Technical Community Programs
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ISO/IEC/IEEE 8802 1AX:2016(E)
Introduction
This introduction is not part of IEEE Std 801.AX™-2014, IEEE Standard for Local and metropolitan area
networks—Link Aggregation.
This standard contains state-of-the-art material. The area covered by this standard is undergoing evolution.
Revisions are anticipated within the next few years to clarify existing material, to correct possible errors, and
®
to incorporate new related material. Information on the current revision state of this and other IEEE 802
standards can be obtained from:
Secretary, IEEE-SA Standards Board
445 Hoes Lane
P.O. Box 1331
Piscataway, NJ 08855-1331
USA
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ISO/IEC/IEEE 8802 1AX:2016(E)
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ISO/IEC/IEEE 8802 1AX:2016(E)
Contents
1. Overview. 1
1.1 Scope. 1
1.2 Purpose. 1
1.3 State diagram conventions . 2
2. Normative references. 3
3. Definitions . 4
4. Acronyms and abbreviations . 7
5. Conformance. 8
5.1 Requirements terminology. 8
5.2 Protocol Implementation Conformance Statement. 8
5.3 Link Aggregation requirements . 8
5.3.1 Link Aggregation options . 9
5.4 Distributed Resilient Network Interconnect requirements . 9
5.4.1 Distribution Resilient Network Interconnect options . 9
6. Link Aggregation. 11
6.1 Overview. 11
6.1.1 Goals and objectives . 11
6.1.2 Positioning of Link Aggregation within the IEEE 802 architecture. 12
6.1.3 LLDP Parser/Multiplexer . 13
6.1.3.1 LLDP Parser state diagram . 14
6.1.3.1.1 LLDP Parser Function . 14
6.1.3.1.2 Constants . 14
6.1.3.1.3 Variables. 14
6.1.3.1.4 State diagram . 14
6.2 Link Aggregation operation.15
6.2.1 Principles of Link Aggregation. 15
6.2.2 Service interfaces. 16
6.2.3 Frame Collector . 17
6.2.3.1 Frame Collector state diagram. 17
6.2.3.1.1 Constants . 17
6.2.3.1.2 Variables. 17
6.2.3.1.3 Messages. 17
6.2.3.1.4 State diagram . 17
6.2.4 Frame Distributor. 18
6.2.4.1 Frame Distributor state diagram . 19
6.2.4.1.1 Variables. 19
6.2.4.1.2 Messages. 19
6.2.4.1.3 State diagram . 19
6.2.5 Marker Generator/Receiver (optional). 19
6.2.6 Marker Responder. 20
6.2.7 Protocol Parser/Multiplexer. 20
6.2.7.1 Protocol Parser state diagram . 20
6.2.7.1.1 Functions . 20
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ISO/IEC/IEEE 8802 1AX:2016(E)
6.2.7.1.2 Variables. 21
6.2.7.1.3 Messages. 21
6.2.7.1.4 State diagram . 21
6.2.8 Aggregator Parser/Multiplexer . 22
6.2.8.1 Aggregator Parser state diagram. 22
6.2.8.1.1 Constants . 22
6.2.8.1.2 Variables. 22
6.2.8.1.3 Messages. 23
6.2.8.1.4 State Diagram . 23
6.2.9 Aggregator . 24
6.2.10 Control Parser/Multiplexer . 24
6.2.10.1 Control Parser state diagram. 24
6.2.10.1.1 Control Parser Function. 24
6.2.10.1.2 Constants . 24
6.2.10.1.3 Variables. 25
6.2.11 Addressing . 25
6.2.11.1 Source address (SA). 25
6.2.11.2 Destination address . 25
6.3 Link Aggregation Control. 26
6.3.1 Characteristics of Link Aggregation Control. 27
6.3.2 System identification . 28
6.3.3 Aggregator identification. 28
6.3.4 Port identification . 28
6.3.5 Capability identifi
...
FINAL
INTERNATIONAL ISO/IEC/
DRAFT
STANDARD IEEE
FDIS
8802-1AX
ISO/IEC JTC 1
Information technology —
Secretariat: ANSI
Telecommunications and information
ISO/IEC voting begins on:
exchange between systems — Local and
2015-06-19
Metropolitan Area Networks —
ISO/IEC voting terminates on:
2015-11-19
Part 1AX:
Link Aggregation
Élément introductif — Élément central —
Partie 1AX: Titre de partie
Please see the administrative notes on page ii-1
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORT-
ING DOCUMENTATION. Reference number
IN ADDITION TO THEIR EVALUATION AS ISO/IEC/IEEE FDIS 8802-1AX:2015(E)
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
IEEE 2015
NATIONAL REGULATIONS.
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ISO/IEC/IEEE 8802-1AX:2015(E)
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ISO/IEC/IEEE 8802-1AX:2015(E)
FAST-TRACK PROCEDURE
This document is submitted under the fast-track procedure in accordance with the Partner
Standards Development Organization cooperation agreement between ISO and IEEE, as approved
by Council Resolution 49/2007, and is submitted to all ISO/IEC national bodies for voting within
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Positive votes shall not be accompanied by comments.
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ISO/IEC/IEEE 8802-1AX:2015(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees established
by the respective organization to deal with particular fields of technical activity. ISO and IEC technical
committees collaborate in fields of mutual interest. Other international organizations, governmental and non-
governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO
and IEC have established a joint technical committee, ISO/IEC JTC 1.
IEEE Standards documents are developed within the IEEE Societies and the Standards Coordinating
Committees of the IEEE Standards Association (IEEE-SA) Standards Board. The IEEE develops its standards
through a consensus development process, approved by the American National Standards Institute, which
brings together volunteers representing varied viewpoints and interests to achieve the final product. Volunteers
are not necessarily members of the Institute and serve without compensation. While the IEEE administers the
process and establishes rules to promote fairness in the consensus development process, the IEEE does not
independently evaluate, test, or verify the accuracy of any of the information contained in its standards.
The main task of ISO/IEC JTC 1 is to prepare International Standards. Draft International Standards adopted
by the joint technical committee are circulated to national bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is called to the possibility that implementation of this standard may require the use of subject matter
covered by patent rights. By publication of this standard, no position is taken with respect to the existence or
validity of any patent rights in connection therewith. ISO/IEEE is not responsible for identifying essential
patents or patent claims for which a license may be required, for conducting inquiries into the legal validity or
scope of patents or patent claims or determining whether any licensing terms or conditions provided in
connection with submission of a Letter of Assurance or a Patent Statement and Licensing Declaration Form, if
any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are expressly
advised that determination of the validity of any patent rights, and the risk of infringement of such rights, is
entirely their own responsibility. Further information may be obtained from ISO or the IEEE Standards
Association.
ISO/IEC/IEEE 8802-1AX was prepared by the LAN/MAN of the IEEE Computer Society (as
IEEE 8802-1AX-2014). It was adopted by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6, Telecommunications and information exchange between systems, in parallel with its
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© IEEE 2015 – All rights reserved iii
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ISO/IEC/IEEE 8802-1AX:2015(E)
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iv © IEEE 2015 – All rights reserved
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IEEE Standard for
Local and metropolitan area networks—
Link Aggregation
IEEE Computer Society
Sponsored by the
LAN/MAN Standards Committee
IEEE
IEEE Std 802.1AX™-2014
3 Park Avenue
(Revision of
New York, NY 10016-5997
IEEE Std 802.1AX-2008)
USA
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IEEE Std 802.1AX™-2014
(Revision of
IEEE Std 802.1AX-2008)
IEEE Standard for
Local and metropolitan area networks—
Link Aggregation
Sponsor
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 10 December 2014
IEEE SA-Standards Board
---------------------- Page: 7 ----------------------
Abstract: MAC-independent Link Aggregation capability and general information relevant to
specific MAC types are defined in this standard. Link Aggregation allows parallel full-duplex point-
to-point links to be used as if they were a single link and also supports the use of multiple links as
a resilient load sharing interconnect between multiple nodes in two separately administered
networks.
Keywords: Aggregated Link, Aggregator, Distributed Resilient Network Interconnect, DRNI,
®
IEEE 802 , IEEE 802.1AX™, interconnect, Link Aggregation, Link Aggregation Group, local area
network, management, Network-Network Interface, NNI
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Copyright © 2014 by The Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 30 December 2014. Printed in the United States of America.
IEEE and 802 are registered trademarks in the U.S. Patent & Trademark Office, owned by The Institute of
Electrical and Electronics Engineers, Incorporated.
Print: ISBN 978-0-7381-9448-6 STD20052
PDF: ISBN 978-0-7381-9449-3 STDPD20052
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Participants
The following individuals were officers and members of the Higher Layer LAN Protocols Working Group at
the beginning of the Working Group ballot. Individuals may have not voted, voted for approval, disapproval,
or abstained on this standard.
Glenn Parsons, Working Group Chair
John Messenger, Working Group Vice Chair
Stephen Haddock, Chair, Interworking Task Group
Michael Seaman, Chair, Security Task Group
Michael Johas Teener, Chair, Time Sensitive Networking Task Group
Pat Thaler, Chair, Data Center Bridging Task Group
Maximilian Riegel, Chair, OmniRAN Task Group
Eric Gray, Recording Secretary
Ting Ao Hitosh Hayakawa Karen Randall
Jeremy Hitt
Christian Boiger Dan Romascanu
Paul Bottorff Rahil Hussain Jessy V. Rouyer
David Chen Anthony Jeffree Panagiotis Saltsidis
Feng Chen Peter Jones Behcet Sarikaya
Weiying Cheng Hal Keen Daniel Sexton
Diego Crupnicoff Marcel Kiessling Johannes Specht
Rodney Cummings Yongbum Kim Kevin B. Stanton
Patrick Diamond Philippe Klein Wilfried Steiner
Aboubacar Kader Diarra Jouni Korhonen Vahid Tabatabaee
Janos Farkas Jeremy Touve
Jeff Lynch
Norman Finn Ben Mack-Crane Karl Weber
Geoffrey Garner Christophe Mangin Yuehua Wei
Anoop Ghanwani James McIntosh Brian Weis
Mark Gravel Eric Multanen Jordon Woods
Craig Gunther Donald Pannell Juan-Carlos Zuniga
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The following members of the individual balloting committee voted on this standard. Balloters may have
voted for approval, disapproval, or abstention.
James Innis
Thomas Alexander Michael Newman
Richard Alfvin Osamu Ishida Nick S.A. Nikjoo
Butch Anton Akio Iso Paul Nikolich
Jacob Ben Ary Atsushi Ito Satoshi Obara
Nancy Bravin Raj Jain Maximilian Riegel
William Byrd Anthony Jeffree Dan Romascanu
Juan Carreon Michael Johas Teener Jessy V. Rouyer
Keith Chow Peter Jones Panagiotis Saltsidis
Charles Cook Shinkyo Kaku Peter Saunderson
Piotr Karocki Michael Seaman
Patrick Diamond
Yezid Donoso Stuart Kerry Kapil Sood
Sourav Dutta Yongbum Kim Thomas Starai
Donald Eastlake, 3rd Bruce Kraemer Rene Struik
Richard Edgar Geoff Ladwig Walter Struppler
Mark Laubach William Taylor
Andrew Fieldsend
Yukihiro Fujimoto John Lemon Dmitri Varsanofiev
Devon Gayle Ru Lin Prabodh Varshney
Anoop Ghanwani Elvis Maculuba George Vlantis
Randall Groves Roger Marks Hung-Yu Wei
Andreas Wolf
Chris Guy Jeffery Masters
Stephen Haddock Brett Mcclellan Chun Yu
Werner Hoelzl Jonathon Mclendon Charles Wong
Rita Horner Richard Mellitz Michael Wright
Victor Hou John Messenger Oren Yuen
Noriyuki Ikeuchi Charles Moorwood Daidi Zhong
Jose Morales
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When the IEEE-SA Standards Board approved this standard on 10 December 2014, it had the following
membership:
John Kulick, Chair
Jon Walter Rosdahl, Vice Chair
Richard H. Hulett, Past Chair
Konstantinos Karachalios, Secretary
Peter Balma Michael Janezic Ron Peterson
Farooq Bari Jeffrey Katz Adrian Stephens
Joseph L. Koepfinger* Peter Sutherland
Ted Burse
David J. Law Yatin Trivedi
Clint Chaplain
Hung Ling Phil Winston
Stephen Dukes
Don Wright
Jean-Phillippe Faure Oleg Logvinov
Yu Yuan
T. W. Olsen
Gary Hoffman
Glenn Parsons
*Member Emeritus
Also included are the following nonvoting IEEE-SA Standards Board liaisons:
Richard DeBlasio, DOE Representative
Michael Janezic, NIST Representative
Michelle Turner
IEEE-SA Content Publishing
Kathryn Bennett
IEEE-SA Technical Community Programs
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Introduction
This introduction is not part of IEEE Std 801.AX™-2014, IEEE Standard for Local and metropolitan area
networks—Link Aggregation.
This standard contains state-of-the-art material. The area covered by this standard is undergoing evolution.
Revisions are anticipated within the next few years to clarify existing material, to correct possible errors, and
®
to incorporate new related material. Information on the current revision state of this and other IEEE 802
standards can be obtained from:
Secretary, IEEE-SA Standards Board
445 Hoes Lane
P.O. Box 1331
Piscataway, NJ 08855-1331
USA
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Contents
1. Overview. 1
1.1 Scope. 1
1.2 Purpose. 1
1.3 State diagram conventions . 2
2. Normative references. 3
3. Definitions . 4
4. Acronyms and abbreviations . 7
5. Conformance. 8
5.1 Requirements terminology. 8
5.2 Protocol Implementation Conformance Statement. 8
5.3 Link Aggregation requirements . 8
5.3.1 Link Aggregation options . 9
5.4 Distributed Resilient Network Interconnect requirements . 9
5.4.1 Distribution Resilient Network Interconnect options . 9
6. Link Aggregation. 11
6.1 Overview. 11
6.1.1 Goals and objectives . 11
6.1.2 Positioning of Link Aggregation within the IEEE 802 architecture. 12
6.1.3 LLDP Parser/Multiplexer . 13
6.1.3.1 LLDP Parser state diagram . 14
6.1.3.1.1 LLDP Parser Function . 14
6.1.3.1.2 Constants . 14
6.1.3.1.3 Variables. 14
6.1.3.1.4 State diagram . 14
6.2 Link Aggregation operation.15
6.2.1 Principles of Link Aggregation. 15
6.2.2 Service interfaces. 16
6.2.3 Frame Collector . 17
6.2.3.1 Frame Collector state diagram. 17
6.2.3.1.1 Constants . 17
6.2.3.1.2 Variables. 17
6.2.3.1.3 Messages. 17
6.2.3.1.4 State diagram . 17
6.2.4 Frame Distributor. 18
6.2.4.1 Frame Distributor state diagram . 19
6.2.4.1.1 Variables. 19
6.2.4.1.2 Messages. 19
6.2.4.1.3 State diagram . 19
6.2.5 Marker Generator/Receiver (optional). 19
6.2.6 Marker Responder. 20
6.2.7 Protocol Parser/Multiplexer. 20
6.2.7.1 Protocol Parser state diagram . 20
6.2.7.1.1 Functions . 20
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6.2.7.1.2 Variables. 21
6.2.7.1.3 Messages. 21
6.2.7.1.4 State diagram . 21
6.2.8 Aggregator Parser/Multiplexer . 22
6.2.8.1 Aggregator Parser state diagram. 22
6.2.8.1.1 Constants . 22
6.2.8.1.2 Variables. 22
6.2.8.1.3 Messages. 23
6.2.8.1.4 State Diagram . 23
6.2.9 Aggregator .
...
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